Search for dissertations about: "Geijer"

Showing result 1 - 5 of 21 swedish dissertations containing the word Geijer.

  2. 1. Diffusion MRI of Small Ischemic Brain Lesions: Technical aspects, clinical experiences and diagnostic criteria

    Author : Bo Geijer; Lund Diagnostisk radiologi; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; radiology; Clinical physics; Metastasis; ADC; b; Infarct; MRI; Ischemia; Diffusion-Weighted; Diffusion; tomography; medical instrumentation; Klinisk fysiologi; radiologi; tomografi; medicinsk instrumentering;

    Abstract : Purpose: To compare the visualization of small ischemic brain lesions using diffusion using diffusion-weighted (DW) MRI and conventional imaging, with special regard to diagnostic efficiency. Imaging features of lesions of different ages, diagnostic limitations and technical principles were also investigated. READ MORE

  4. 2. Goal conflicts and spillover effects in Swedish environmental policy

    Author : Erik Geijer; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Keywords : LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES;

    Abstract : This thesis consists of a summary and four appended papers on conflicts in inter-related goals in Swedish environmental policies and projects. Paper I analyses conflicts between two of these goals Reduced Climate Impact and Sustainable Forests or, more precisely, the conflict between conserving forests and supplying forest fuel. READ MORE

  5. 3. Radiation dose and image quality in diagnostic radiology : optimization of the dose - image quality relationship with clinical experience from scoliosis radiography, coronary intervention and a flat-panel digital detector

    Author : Håkan Geijer; Hans Ringertz; Linköpings universitet; []
    Keywords : MEDICINE; MEDICIN;

    Abstract : Det är känt att röntgenstrålning kan orsaka cancersjukdomar, hudskador och andra sidoeffekter. Därför är det viktigt och även föreskrivet i lag att strålexpaneringen inom diagnostisk radiologi skall sänkas så långt som möjligt. Detta kallas på engelska ALARA-principen (As Low As Reasonably Achievable). READ MORE

  6. 4. Effects of Protons and Small Alcohols on the Oxygen-Evolving Complex of Photosystem II

    Author : Paulina Geijer; Biokemi och Strukturbiologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; EPR; pH; methanol; S3; S2; S0; YZ; Mn cluster; Oxygen-evolving complex; S-states; Biochemistry; Metabolism; Biokemi; metabolism;

    Abstract : Higher plants and algae use oxygenic photosynthesis to convert solar energy to reducing equivalents and chemical energy. The ultimate electron donor to oxygenic photosynthesis is water. Oxidation of water to oxygen occurs in the oxygen-evolving complex (OEC) in Photosystem II (PSII). The OEC is composed of four Mn atoms, Ca2+ and Cl-. READ MORE

  7. 5. Genes that modulate or mediate dopaminergic neurotransmission : expression of the human prodynorphin gene and association studies with candidate genes in an alcohol patient sample

    Author : Thomas Geijer; Karolinska Institutet; Karolinska Institutet; []
    Keywords : association study; alcoholism; DNA polymorphisms; dopamine receptors DRD2; DRD3; DRD4 ; tyrosine hydroxylase TH ; prodynorphin; messengerRNA; gene expression; promotor Stockholm 1997;

    Abstract : The development of alcoholism may at least partly be attributed to the effect of ethanol on reward and reinforcement. As a genetic influence in the vulnerability to alcoholism and drug abuse has been documented, it is of interest to investigate genes active in brain structures which mediate reward and reinforcement. READ MORE